[llvm-commits] LLVM patch to implement UMLAL/SMLAL Instructions for ARM Architecture.

[Yin Ma]

The current definition of UMLAL/SMLAL in LLVM for ARM is not used and the

definition is not correct because the instruction reads the four values

as the input values instead of two values defined in the .td file.

 

I have created a bugzilla entry  regarding to this issue:

http://llvm.org/bugs/show_bug.cgi?id=12213

 

I am proposing a patch not only fixed the definition but also added the
corresponding 

generation algorithm on DAG. This algorithm only operates on ARM backend. It
identifies the 

opportunity of conversions during DAG process. 

 

llmla.diff is the code change

longMAC.ll is the test case for ARM

longMACt.ll is the test case for Thumb2

report.simple.txt is the result from test-suites

result.txt is the result from test

 

Please give a review. Thanks,

 

                                        Yin 

 

 

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